EP4072504A1 - Cellulose nanocrystal effect pigments for cosmetic applications - Google Patents
Cellulose nanocrystal effect pigments for cosmetic applicationsInfo
- Publication number
- EP4072504A1 EP4072504A1 EP20839230.8A EP20839230A EP4072504A1 EP 4072504 A1 EP4072504 A1 EP 4072504A1 EP 20839230 A EP20839230 A EP 20839230A EP 4072504 A1 EP4072504 A1 EP 4072504A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- range
- weight
- cosmetic composition
- flakes
- effect pigment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/0241—Containing particulates characterized by their shape and/or structure
- A61K8/0254—Platelets; Flakes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
- A61K8/731—Cellulose; Quaternized cellulose derivatives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
- A61Q1/02—Preparations containing skin colorants, e.g. pigments
- A61Q1/04—Preparations containing skin colorants, e.g. pigments for lips
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
- A61Q1/02—Preparations containing skin colorants, e.g. pigments
- A61Q1/04—Preparations containing skin colorants, e.g. pigments for lips
- A61Q1/06—Lipsticks
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
- A61Q1/02—Preparations containing skin colorants, e.g. pigments
- A61Q1/10—Preparations containing skin colorants, e.g. pigments for eyes, e.g. eyeliner, mascara
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q3/00—Manicure or pedicure preparations
- A61Q3/02—Nail coatings
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B61/00—Dyes of natural origin prepared from natural sources, e.g. vegetable sources
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/006—Preparation of organic pigments
- C09B67/0066—Aqueous dispersions of pigments containing only dispersing agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/42—Colour properties
- A61K2800/43—Pigments; Dyes
- A61K2800/436—Interference pigments, e.g. Iridescent, Pearlescent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
Definitions
- the present invention relates to a cosmetic composition comprising an organic effect pigment, a process for preparing a cosmetic composition comprising an organic effect pigment, a use of the organic effect pigment and a kit for preparing two cosmetic compositions comprising the organic effect pigment.
- Effect pigments also known as pearlescent pigments or nacreous pigments, are used to impart a pearlescent luster, metallic luster, and/or multi-color effect approaching iridescence, to a ma terial.
- pearlescent pigments also known as pearlescent pigments or nacreous pigments
- fluorphlogopite mica pigment, mica based ferric ferrocyanide pigment and borosilicate flakes are used in cosmetics.
- Other pigments such as colored polyethylene tereph- thalate (PET) glitter are also used in cosmetics.
- PET polyethylene tereph- thalate
- CNCs Cellulose nanocrystals
- These nanocrystals are used in the cosmetic field as fillers or thickeners as described for example in WO 2018/100065 A1 and JP 2017/048181 A.
- US 2019/0002700 A1 discloses cellulose-based organic pigments which might be used for cosmetic applications. Flowever, it is completely silent regarding any structural color element and uses cellulose nanocrystals powder only with dye to color a composition and the color will depend only on the used dye.
- WO 2012/112541 A2 discloses a pigment composition comprising two effect pigments, wherein the hue of the composition is comparable to carmine. Said pigment composition may be incor porated into cosmetic compositions. Flowever, said pigment composition permits to obtain only one color/hue in the cosmetic compositions.
- the present invention relates to a cosmetic composition
- a cosmetic composition comprising an organic effect pigment, wherein the organic effect pigment comprises cellulose nanocrystal flakes, wherein the cellulose nanocrystal flakes have an average size in the range of from 10 to 6500 micrometers, determined as defined in Reference Example 1a.
- the organic effect pigment consists of the cellulose nanocrystal flakes.
- the present invention preferably relates to a cosmetic composition comprising an organic effect pigment, wherein the organic effect pigment consists of cellulose nanocrystal flakes, wherein the cellulose nanocrystal flakes have an average size in the range of from 10 to 6500 micrometers, determined as defined in Reference Example 1a.
- the cellulose nanocrystal flakes have an average size in the range of from 50 to 2000 micrometers, more preferably in the range of from 200 to 900 micrometers, more preferably in the range of from 400 to 800 micrometers, determined as defined in Reference Example 1a.
- the cellulose nanocrystal flakes have an average surface area in the range of from 1 to 200 mm 2 , more preferably in the range of from 5 to 175 mm 2 , more preferably in the range of from 10 to 150 mm 2 , determined as described in Reference Example 1b.
- the cellulose nanocrystal flakes have an average thickness in the range of from 30 to 200 micrometers, more preferably in the range of from 40 to 150 micrometers, more preferably in the range of from 50 to 100 micrometers, determined as described in Reference Example 1c.
- the cellulose nanocrystal flakes exhibit a circular shape or a hexagonal shape.
- the cellulose nanocrystal flakes are iridescent.
- the cosmetic composition comprises the organic effect pigment in an amount in the range of from 0.025 to 99 weight-%, more preferably in the range of from 0.04 to 80 weight-%, more preferably in the range of from 0.05 to 30 weight-%, more preferably in the range of from 0.10 to 20 weight-%, more preferably in the range of from 0.5 to 15 weight-%, more preferably in the range of from 1 to 10 weight-%, more preferably in the range of from 2 to 8 weight-%, based on the total weight of the cosmetic composition. It is more preferred that the cosmetic composition comprises the organic effect pigment in an amount in the range of from 3 to 7 weight-% based on the total weight of the cosmetic composition.
- the present invention preferably relates to a cosmetic composition
- a cosmetic composition comprising an organic effect pigment
- the organic effect pigment comprises, more preferably consists of, cellulose nanocrystal flakes, wherein the cellulose nanocrystal flakes have an average size in the range of from 10 to 6500 micrometers, more preferably in the range of from 50 to 2000 micrometers, determined as defined in Reference Example 1a
- the cosmetic composi tion comprises the organic effect pigment in an amount in the range of from 0.025 to 99 weight- %, more preferably in the range of from 0.04 to 80 weight-%, more preferably in the range of from 0.05 to 30 weight-%, more preferably in the range of from 0.10 to 20 weight-%, more pref erably in the range of from 0.5 to 15 weight-%, more preferably in the range of from 1 to 10 weight-%, more preferably in the range of from 2 to 8 weight-%, more preferably in the range of from 3 to 7 weight-%, based on the total weight of the cosmetic composition.
- the cosmetic composition further com prises a liquid phase, wherein the cellulose nanocrystal flakes form a mixture with said liquid phase, wherein the liquid phase more preferably contains a cosmetically acceptable liquid me dium.
- a temperature of the composition in the range of from 5 to 70 °C, more preferably in the range of from 10 to 60 °C, more preferably in the range of from 15 to 50 °C, from 99 to 100 weight-%, more preferably from 99.5 to 100 weight-%, more preferably from 99.9 to 100 weight-%, of the cellulose nanocrystal flakes are dispersed in the cosmetically accepta ble liquid medium.
- the color of the cellulose nanocrystal flakes in the visible spectrum depends on the dielectric constant of the liquid phase.
- liquid phase is an aqueous phase or an anhydrous phase.
- aqueous phase it is preferred that it comprises water in amount in the range of from 40 to 99 weight-%, more preferably in the range of from 50 to 98.5 weight-%, more preferably in the range of from 60 to 98 weight-%, based on the total weight of the liquid phase.
- the present invention preferably relates to a cosmetic composition
- a cosmetic composition comprising an organic effect pigment, wherein the organic effect pigment comprises, more preferably consists of, cellulose nanocrystal flakes, wherein the cellulose nanocrystal flakes have an average size in the range of from 10 to 6500 micrometers, more preferably in the range of from 50 to 2000 micrometers, determined as defined in Reference Example 1a, wherein the cosmetic composition further comprises a liquid phase, wherein the cellulose nano crystal flakes form a mixture with said liquid phase, wherein the liquid phase more preferably contains a cosmetically acceptable liquid medium, wherein the liquid phase is an aqueous phase comprising water in amount in the range of from 40 to 99 weight-%, more preferably in the range of from 50 to 98.5 weight-%, more preferably in the range of from 60 to 98 weight-%, based on the total weight of the liquid phase.
- the organic effect pigment comprises, more preferably consists of, cellulose nanocrystal flakes, wherein the cellulose nanocrystal
- the dielectric constant of the aque ous phase is different to the dielectric constant of the anhydrous phase.
- the color of the cellulose nanocrystal flakes in the cosmetic composition will vary in the visible spectrum.
- anhydrous phase it is preferred that it compris es an oil in amount in the range of from 40 to 90 weight-%, more preferably in the range of from 45 to 89.5 weight-%, more preferably in the range of from 50 to 89 weight-%, based on the total weight of the liquid phase.
- the oil comprised in the anhydrous phase is one or more of a mineral oil, an animal oil, a vegetal oil and a synthetic oil, more preferably one or more of a vegetal oil, a min- eral oil and a synthetic oil, more preferably one or more of a synthetic oil and a mineral oil, more preferably a synthetic oil.
- the present invention preferably relates to a cosmetic composition
- a cosmetic composition comprising an organic effect pigment, wherein the organic effect pigment comprises, more preferably consists of, cellulose nanocrystal flakes, wherein the cellulose nanocrystal flakes have an average size in the range of from 10 to 6500 micrometers, more preferably in the range of from 50 to 2000 micrometers, determined as defined in Reference Example 1a, wherein the cosmetic composition further comprises a liquid phase, wherein the cellulose nano crystal flakes form a mixture with said liquid phase, wherein the liquid phase more preferably contains a cosmetically acceptable liquid medium, wherein the liquid phase is an anhydrous phase comprising an oil in amount in the range of from 40 to 90 weight-%, more preferably in the range of from 45 to 89.5 weight-%, more preferably in the range of from 50 to 89 weight-%, based on the total weight of the liquid phase, wherein the oil more preferably is one or more of a mineral oil, an animal oil, a vegetal oil and a synthetic oil, more
- the cosmetic composition further com prises at least one additional cosmetically acceptable component other than the organic effect pigment.
- said cosmetically acceptable component is one or more of a surfac tant, an oil other than the oil defined in the foregoing, a cosmetically active ingredient, a pre servative, a chelating agent, a neutralizing agent, a rheological agent, an excipient, an emulsifi er, a fragrance, a thickener, a polymer, a gel former, a photoprotective agent, an antioxidant, an antifoams, a resin, a stabilizer, a sterilizing agent, a propellant, a drying agent, an humectant, an antioxidant and a plant extract.
- said cosmetically acceptable compo nent is one or more of a surfactant, an oil other than the oil defined in the foregoing, a cosmeti cally active ingredient, a preservative, a chelating agent, a neutralizing agent, a rheological agent, an excipient, an emulsifier, and a fragrance.
- said cosmetically acceptable component is one or more of a surfactant, an oil other than the oil defined in the foregoing, a cosmetically active ingredient, a preservative, a chelating agent, a neutralizing agent, and a rheological agent.
- the cosmetic composition further comprises at least one additional cosmeti cally acceptable component other than the organic effect pigment, wherein said at least one cosmetically acceptable component is dissolved in the liquid medium, the at least one cosmeti cally acceptable component forming the liquid phase with the liquid medium, wherein the at least one additional cosmetically acceptable component other than the organic effect pigment more preferably is as defined in the foregoing.
- the cosmetic composition is in the form of a cream, an emulsion, a foam, a gel, a lotion, a milk, a mousse, an ointment, a paste, a spray, or a suspension. It is preferred that from 0 to 0.001 weight-%, more preferably from 0 to 0.0001 weight-%, more preferably from 0 to 0.00001 weight-%, of the cosmetic composition consist of an effect pigment other than the organic effect pigment defined in the foregoing.
- the cosmetic composition consist of a polyelectrolyte.
- the cellulose nanocrystal flakes are not coated with one or more inorganic oxides. Indeed, it is not necessary for the cellulose nanocrystal flakes to be coated with any inorganic oxides in order to present different colors, preferably absorption colors, in a cosmetic composition.
- the cellulose nanocrystal flakes are obtained or obtainable by a process comprising (i) and (ii) as defined in the following.
- the present invention relates to a process for preparing a cosmetic composition, prefer ably the cosmetic composition according to the present invention and as defined above, the process comprising
- the cellulose nanocrys tals are comprised in an amount in the range of from 0.05 to 10 weight-%, more preferably in the range of from 0.1 to 8 weight-%, more preferably in the range of from 0.5 to 6 weight-%, more preferably in the range of from 0.75 to 5 weight-%, more preferably in the range of from 1 to 4 weight-%, based on the total weight of the aqueous dispersion.
- the cellulose nanocrystals in the aqueous dispersion provided according to (i) are sodium cellulose nanocrystals sulfate, wherein the sulfur content is of less than 1 weight %, more preferably less than 0.9 weight-%, based on the weight of the cellulose nanocrystals.
- the aqueous dispersion provided according to (i) is an acidic aqueous disper sion, wherein the aqueous phase of the dispersion has a pH in the range of from 0 to 5, more preferably in the range of from 1 to 4, more preferably in the range of from 2 to 3.
- the pH pref erably is determined as described in Reference Example 1d.
- the aqueous dispersion provided according to (i) additionally comprises an acid, wherein the acid more preferably is one or more of a hydrochloric acid, a sulfonic acid, a nitric acid and a citric acid, more preferably one or more of a hydrochloric acid, a nitric acid and a citric acid, more preferably one or more of a hydrochloric acid and a citric acid, more prefera bly a hydrochloric acid.
- the acid more preferably is one or more of a hydrochloric acid, a sulfonic acid, a nitric acid and a citric acid, more preferably one or more of a hydrochloric acid, a nitric acid and a citric acid, more prefera bly a hydrochloric acid.
- the water comprised in the aqueous dispersion provided according to (i) is deionized water.
- the cellulose nanocrystals comprised in the aqueous suspension provided according to (i) have an average particle size in the range of from 1 to 50 micrometers.
- the av erage particle size preferably is determined as described in Reference Example 1e.
- the cellulose nanocrystals comprised in the aqueous suspension provided according to (i) are hydrolyzed cellulose nanocrystals.
- the cellulose nanocrystals comprised in the aqueous suspension provided according to (i) exhibit a crystallite average particle diameter in the range of from 1 to 10 nm, more preferably in the range of from 1 .5 to 6 nm, more preferably in the range of from 2 to 5 nm, determined as described in Reference Example 1f.
- the cellulose nanocrystals comprised in the aqueous suspension provided according to (i) exhibit a crystallite average particle length in the range of from 20 to 200 nm, more preferably in the range of from 30 to 150 nm, more preferably in the range of from 40 to 110 nm, determined as described in Reference Example 1f.
- the cellulose nanocrystals comprised in the aqueous suspension provided according to (i) exhibit a crystallinity in the range of from 70 to 100 %, more preferably in the range of from 85 to 100 %, determined as described in Reference Example 1g.
- the cellulose nanocrystals comprised in the aqueous suspension according to (i) have a BET specific surface area in the range of from 150 to 700 m 2 /g, more preferably in the range of from 200 to 600 m 2 /g, more preferably in the range of from 300 to 500 m 2 /g.
- the BET specific surface area preferably is determined as described in Reference Example 1h.
- the cellulose nanocrystals comprised in the aqueous suspension provided according to (i) are obtainable or obtained by a method comprising
- the process of the present invention further comprises preparing the cellulose nanocrystals according to (i), said preparing comprising (a) isolating cellulose from a natural source of cellulose, more preferably from wood or cotton;
- the aqueous dispersion provided according to (i) additionally comprises a cosmetically acceptable dye, more preferably a cosmetically acceptable water-soluble dye at a temperature in the range of from 10 to 50 °C, more preferably in the range of from 15 to 30 °C.
- a cosmetically acceptable dye more preferably a cosmetically acceptable water-soluble dye at a temperature in the range of from 10 to 50 °C, more preferably in the range of from 15 to 30 °C.
- the cosmetically acceptable dye is selected from the group consisting of a blue dye, a black dye, a red dye, a green dye, a yellow dye, a violet dye, an orange dye and a brown dye.
- the cosmetically acceptable dye is present in the aqueous dispersion provid ed according to (i) in an amount in the range of from 0.0005 to 0.1 weight-%, more preferably in the range of from 0.001 to 0.05 weight-%, more preferably in the range of from 0.001 to 0.01 weight-%, based on the weight of the aqueous dispersion provided according to (i).
- the aqueous dispersion provided according to (i) additionally comprises a salt, wherein the salt is one or more of sodium chloride (NaCI), potassium chloride (KCI), sodi um iodide (Nal), potassium iodide (Kl), ammonium chloride (NhUCI) and sodium sulfate (Na2SC>4).
- the salt is one or more of sodium chloride (NaCI), potassium chloride (KCI), sodi um iodide (Nal), potassium iodide (Kl), ammonium chloride (NhUCI) and sodium sulfate (Na2SC>4).
- the mass ratio of salt relative to water, m(salt) : m(water), is in the range of from 0.00001:1 to 0.1:1, more pref erably in the range of from 0.0001:1 to 0.01:1, more preferably in the range of from 0.0001:1 to 0.001:1.
- the process comprises preparing the aqueous dispersion and subjecting the dispersion, prior to (ii), to sonication.
- the cellulose nanocrystals more preferably the hydrolyzed cellulose nanocrystals, more preferably an acid as defined in the foregoing, and optionally one or more of a cosmetical ly acceptable absorption dye as defined in the foregoing and a salt as defined in in the forego ing.
- subjecting the aqueous suspension provided according to (i) to drying condi tions according to (ii) comprises pouring the aqueous dispersion provided according to (i), into a container; drying the aqueous dispersion into the container, obtaining a film.
- drying the aqueous dispersion is performed in a gas atmosphere having a temperature in the range of from 15 to 30 °C, more preferably in the range of from 18 to 25 °C, more preferably for a duration in the range of from 10 to 30 hours, wherein the gas atmosphere more preferably comprises one or more of oxygen and nitrogen, wherein the gas atmosphere more preferably comprises nitrogen or more preferably is air.
- drying the aqueous dispersion is performed in a gas atmosphere having a temperature in the range of from 40 to 90 °C, more preferably in the range of from 65 to 85 °C, more preferably for a duration in the range of from 2 to 8 hours, more preferably in the range of from 3 to 7 hours, wherein the gas atmosphere more preferably comprises oxygen, wherein the gas atmosphere more preferably comprises one or more of oxygen and nitrogen, wherein the gas atmosphere more preferably comprises nitrogen or more preferably is air.
- the film obtained in (ii) is an iridescent film.
- the film obtained in (ii) has an average thickness in the range of from 30 to 200 micrometers, more preferably in the range of from 50 to 100 micrometers, determined as described in Reference Example 1c.
- the film has a water content in the range of from 0.1 to 5 weight-%, more preferably in the range of from 0.1 to 1 weight-%, based on the total weight of the film.
- fragmenting said film into flakes according to (ii) is performed until the aver age size of the flakes is in the range of from 10 to 6500 micrometers, more preferably in the range of from 50 to 2000 micrometers, more preferably in the range of from 200 to 1000 mi crometers, more preferably in the range of from 400 to 800 micrometers, determined as defined in Reference Example 1a.
- (ii) further comprises screening the obtained flakes.
- the organic effect pigment comprised in the mixture prepared according to (iii) is present in amount in the range of from 0.025 to 99 weight-%, more preferably in the range of from 0.04 to 80 weight-%, more preferably in the range of from 0.05 to 30 weight-%, more pref erably in the range of from 0.10 to 20 weight-%, more preferably in the range of from 0.5 to 15 weight-%, more preferably in the range of from 1 to 10 weight-%, more preferably in the range of from 2 to 8 weight-%, more preferably in the range of from 3 to 7 weight-%, based on the total weight of the mixture. It is preferred that the liquid phase in the mixture prepared according to (iii) contains a cosmeti cally acceptable liquid medium.
- the liquid phase in the mixture prepared according to (iii) has a dielectric con stant in the range of from 1 to 100, more preferably in the range of from 2 to 80, more preferably determined as described in Reference Example 1i.
- liquid phase in the mixture prepared in (iii) is an aqueous phase or an anhydrous phase.
- aqueous phase it is preferred that it comprises water in amount in the range of from 50 to 99 weight-%, preferably in the range of from 60 to 99 weight-%, based on the total weight of the liquid phase.
- the aqueous phase has a pH in the range of from 4 to 10, more preferably in the range of from 6 to 8.
- the pH preferably is determined as described in Reference Example 1d.
- anhydrous phase it is preferred that it comprises an oil in amount in the range of from 40 to 90 weight-%, more preferably in the range of from 59 to 80 weight-%, based on the total weight of the liquid phase.
- the anhydrous phase comprises an oil being one or more of a mineral oil, an animal oil, a vegetal oil and a synthetic oil, more preferably one or more of a mineral oil, a vege tal oil and a synthetic oil, more preferably a synthetic oil.
- the mixture prepared in (iii) further comprises at least one additional cosmeti cally acceptable component other than the organic effect pigment.
- the at least one additional cosmetically acceptable component is one or more of a surfactant, an oil other than the oil defined in the foregoing, a cosmetically active ingredient, a preservative, a chelating agent, a neutralizing agent, a rheological agent, an excipient, an emulsifier, a fragrance, a thickener, a polymer, a gel former, a photoprotective agent, an antiox idant, an antifoams, a resin, a stabilizer, a sterilizing agent, a propellant, a drying agent, an hu- mectant, an antioxidant and a plant extract.
- a surfactant an oil other than the oil defined in the foregoing
- a cosmetically active ingredient e.g., a preservative, a chelating agent, a neutralizing agent, a rheological agent, an excipient, an emulsifier, a fragrance, a thickener, a polymer, a gel
- said cosmetically accepta ble component is one or more of a surfactant, an oil other than the oil defined in the foregoing, a cosmetically active ingredient, a preservative, a chelating agent, a neutralizing agent, a rheolog ical agent, an excipient, an emulsifier, and a fragrance. It is more preferred that said cosmetical ly acceptable component is one or more of a surfactant, an oil other than the oil defined in the foregoing, a cosmetically active ingredient, a preservative, a chelating agent, a neutralizing agent, and a rheological agent.
- the mixture prepared in (iii) further comprises at least one additional cosmeti cally acceptable component other than the organic effect pigment, wherein said component is dissolved in the liquid medium, said at least one additional cosmetically acceptable component forming the liquid phase with the cosmetically acceptable liquid medium.
- the at least one additional cosmetically acceptable component other than the organic effect pigment is the at least one additional cosmetically acceptable component as defined in the fore going and that the liquid phase is as defined in the foregoing.
- preparing a mixture comprising the organic effect pigment obtained from (ii), and the liquid phase, according to (iii) comprises mixing the organic effect pigment and the liquid phase at a temperature in the range of from 15 to 30 °C, more preferably in the range of from 18 to 25 °C.
- the present invention further relates to a method for preparing two or more cosmetic composi tions, said cosmetic compositions comprising the same organic effect pigment, which compris es, preferably consists of, cellulose nanocrystal flakes, as coloring agent and having different flake colors in the visible range, the method comprising adjusting the dielectric constant of the liquid phase of said cosmetic compositions, wherein the organic effect pigment more preferably is obtainable or obtained by a process comprising (i) and (ii) as defined in the foregoing.
- Adjusting the dielectric constant of the liquid phase of said cos metic compositions preferably is to be understood as adjusting the dielectric constant of the liquid phase of a first cosmetic composition and adjusting the dielectric constant of the liquid phase of a second cosmetic composition such that the dielectric constant of the liquid phase of the first cosmetic composition is not equal to the dielectric constant of the liquid phase of the second cosmetic composition; or is to be understood as adjusting the dielectric constant of the liquid phase of a first cosmetic composition such that the dielectric constant of the liquid phase of the first cosmetic composition is not equal to the dielectric constant of the liquid phase of a second cosmetic composition.
- each of the cosmetic compositions is in the form of a cream, an emulsion, a foam, a gel, a lotion, a milk, a mousse, an ointment, a paste, a spray or a suspension.
- the present invention further relates to a use of an organic effect pigment, comprising, prefera bly consisting of, cellulose nanocrystal flakes, as coloring agent for preparing two or more cos metic compositions, preferably cosmetic compositions in the form of a cream, an emulsion, a foam, a gel, a lotion, a milk, a mousse, an ointment, a paste, a spray or a suspension, said two or more compositions having different flake colors in the visible range, wherein the organic ef fect pigment is obtainable or obtained by a process comprising (i) and (ii) as defined in the fore going. It is preferred that the liquid phases of the two or more cosmetic compositions exhibit different dielectric constants.
- the dielectric constants preferably are determined as described in Refer ence Example 1i.
- a first cosmetic composition has cellulose nanocrystal flakes having a green absorption color with blue iridescence and a second cosmetic composition has cellulose nano crystal flakes having blue, red, pink, black or grey absorption color with blue iridescence.
- the present invention further relates to a use of a cosmetic composition according to the pre sent invention and as defined in the foregoing as a lip balm, an eyeshadow, a nail polish, a mascara, an eyeliner or a lipstick.
- the present invention further relates to a kit for preparing two cosmetic compositions having different flake colors in the visible range, comprising:
- the organic effect pigment comprises, preferably con sists of, cellulose nanocrystal flakes, wherein the cellulose nanocrystal flakes have an av erage size in the range of from 10 to 6500 micrometers determined as defined in Refer ence Example 1a, wherein the organic effect pigment preferably is as defined in the fore going;
- the first cosmetic composition comprises a first liquid phase and that the sec ond cosmetic composition comprises a second liquid phase, wherein the first liquid phase and the second liquid phase exhibit different dielectric constants, more preferably determined as described in Reference Example 1i.
- this is to be under stood such that the first liquid phase may have a dielectric constant of about 2 and the second liquid phase may have a dielectric constant of about 50. Indeed, this would permit to obtain a first cosmetic composition having cellulose nanocrystal flakes of a certain color and a second cosmetic composition having cellulose nanocrystal flakes of a color other than the color of the cellulose nanocrystal flakes of the first cosmetic composition.
- a cosmetic composition comprising an organic effect pigment, wherein the organic effect pigment comprises cellulose nanocrystal flakes, wherein the cellulose nanocrystal flakes have an average size in the range of from 10 to 6500 micrometers, determined as defined in Reference Example 1a.
- any one of embodiments 1 to 7, comprising the organic ef fect pigment in an amount in the range of from 0.025 to 99 weight-%, preferably in the range of from 0.04 to 80 weight-%, more preferably in the range of from 0.05 to 30 weight- %, more preferably in the range of from 0.10 to 20 weight-%, more preferably in the range of from 0.5 to 15 weight-%, more preferably in the range of from 1 to 10 weight-%, more preferably in the range of from 2 to 8 weight-%, more preferably in the range of from 3 to 7 weight-%, based on the total weight of the cosmetic composition.
- composition of embodiment 12, wherein the aqueous phase comprises wa ter in amount in the range of from 40 to 99 weight-%, preferably in the range of from 50 to
- composition of embodiment 12, wherein the anhydrous phase comprises an oil in amount in the range of from 40 to 90 weight-%, preferably in the range of from 45 to
- anhydrous phase com prises an oil being one or more of a mineral oil, an animal oil, a vegetal oil and a synthetic oil, preferably one or more of a vegetal oil, a mineral oil and a synthetic oil, more prefera bly one or more of a synthetic oil and a mineral oil, more preferably a synthetic oil.
- composition of any one of embodiments 1 to 17, being in the form of a cream, an emulsion, a foam, a gel, a lotion, a milk, a mousse, an ointment, a paste, a spray, or a suspension.
- a process for preparing a cosmetic composition preferably the composition according to any one of embodiments 1 to 22, the process comprising
- the cellulose nanocrystals are comprised in an amount in the range of from 0.05 to 10 weight-%, preferably in the range of from 0.1 to 8 weight-%, more preferably in the range of from 0.5 to 6 weight-%, more preferably in the range of from 0.75 to 5 weight-%, more preferably in the range of from 1 to 4 weight-%, based on the total weight of the aqueous dispersion.
- cellulose nanocrystals in the aqueous dispersion provided according to (i) are sodium cellulose nanocrystals sulfate, wherein the sulfur content is of less than 1 weight %, preferably less than 0.9 weight-%, based on the weight of the cellulose nanocrystals.
- the aqueous dispersion pro vided according to (i) additionally comprises an acid, wherein the acid preferably is one or more of a hydrochloric acid, a sulfonic acid, a nitric acid and a citric acid, more preferably one or more of a hydrochloric acid, a nitric acid and a citric acid, more preferably one or more of a hydrochloric acid and a citric acid, more preferably a hydrochloric acid.
- any one of embodiments 23 to 33 wherein the cellulose nanocrystals comprised in the aqueous suspension according to (i) have a BET specific surface area in the range of from 150 to 700 m 2 /g, preferably in the range of from 200 to 600 m 2 /g, more preferably in the range of from 300 to 500 m 2 /g, determined as described in Reference Example 1h.
- the process of any one of embodiments 23 to 34, wherein the cellulose nanocrystals comprised in the aqueous suspension provided according to (i) are obtainable or obtained by a method comprising
- the aqueous dispersion pro vided according to (i) additionally comprises a cosmetically acceptable dye, preferably a cosmetically acceptable water-soluble dye at a temperature in the range of from 10 to 50 °C, preferably in the range of from 15 to 30 °C.
- the cosmetically acceptable dye is selected from the group consisting of a blue dye, a black dye, a red dye, a green dye, a yellow dye, a vi olet dye, an orange dye and a brown dye.
- the aqueous dispersion pro vided according to (i) additionally comprises a salt, wherein the salt is one or more of so dium chloride (NaCI), potassium chloride (KCI), sodium iodide (Nal), potassium iodide (Kl), ammonium chloride (NhUCI), sodium sulfate (Na2SC>4).
- the salt is one or more of so dium chloride (NaCI), potassium chloride (KCI), sodium iodide (Nal), potassium iodide (Kl), ammonium chloride (NhUCI), sodium sulfate (Na2SC>4).
- aqueous phase comprises water in amount in the range of from 50 to 99 weight-%, preferably in the range of from 60 to 99 weight-%, based on the total weight of the liquid phase.
- aqueous phase has a pH in the range of from 4 to 10, preferably in the range of from 6 to 8, determined as described in Refer ence Example 1d.
- anhydrous phase comprises an oil in amount in the range of from 40 to 90 weight-%, preferably in the range of from 59 to 80 weight-%, based on the total weight of the liquid phase.
- anhydrous phase comprises an oil be ing one or more of a mineral oil, an animal oil, a vegetal oil and a synthetic oil, preferably one or more of a mineral oil, a vegetal oil and a synthetic oil, more preferably a synthetic oil.
- said cosmetically acceptable component is one or more of a surfactant, an oil other than the oil defined in embodiment 60, a cosmetically active ingredient, a preservative, a chelating agent, a neutralizing agent, a rheological agent, an excipient, an emulsifier, a fragrance, a thickener, a polymer, a gel former, a pho- toprotective agent, an antioxidant, an antifoams, a resin, a stabilizer, a sterilizing agent, a propellant, a drying agent, an humectant, an antioxidant and a plant extract; wherein said cosmetically acceptable component preferably is one or more of a surfactant, an oil other than the oil defined in embodiment 60, a cosmetically active in gredient, a preservative, a chelating agent, a neutralizing agent, a rheological agent, an excipient, an emulsifier, and a fragrance; wherein said cosmetically acceptable component preferably is one or more of
- a method for preparing two or more cosmetic compositions comprising the same organic effect pigment, which comprises cellulose nanocrystal flakes, as coloring agent and having different flake colors in the visible range, the method comprising adjusting the dielectric constant of the liquid phase of said cosmetic compositions, where in the organic effect pigment is preferably obtainable or obtained by a process comprising (i) and (ii) as defined in any one of embodiments 23 to 52.
- each of the cosmetic compositions is in the form of a cream, an emulsion, a foam, a gel, a lotion, a milk, a mousse, an ointment, a paste, a spray or a suspension.
- an organic effect pigment comprising cellulose nanocrystal flakes, as coloring agent for preparing two or more cosmetic compositions, preferably cosmetic compositions in the form of a cream, an emulsion, a foam, a gel, a lotion, a milk, a mousse, an ointment, a paste, a spray or a suspension, said two or more compositions having different flake colors in the visible range, wherein the organic effect pigment is obtainable or obtained by a process comprising (i) and (ii) as defined in any one of embodiments 23 to 52.
- a cosmetic composition according to any one of embodiments 1 to 22 as a lip balm, an eyeshadow, a nail polish, a mascara, an eyeliner or a lipstick.
- a kit for preparing two cosmetic compositions having different flake colors in the visible range comprising:
- the organic effect pigment comprises cellulose nanocrystal flakes, wherein the cellulose nanocrystal flakes have an average size in the range of from 10 to 6500 micrometers determined as defined in Reference Ex ample 1a, wherein the organic effect pigment is preferably as defined in any one of embodiments 1 to 7;
- dieletric con stant or polarity (determined through dielectric constant) of a cosmetic composition or of a cos metic base has an effect on the absorption color of an organic effect pigment, namely the cellu lose nanocrystal flakes.
- dielectric constant a parameter that influences the absorption color of flakes (glitters) in a cosmetic composition while using the same starting organic effect pigment, namely cellulose nanocrystal flakes. This is illustrated by the different examples of the present invention.
- a cosmetically acceptable liquid medium is a liquid me dium that is compatible with the skin and/or its integuments. It is preferably a liquid medium which has a pleasant color, odor and/or feel and which does not cause any unacceptable dis comfort (stinging, tautness or redness) liable to discourage the consumer from using the cos metic composition comprising it.
- liquid in “liquid medium” or “liquid phase” means that at a temperature of the cosmetic composition in the range of from 5 to 70 °C, preferably in the range of from 10 to 60 °C, more preferably in the range of from 15 to 50 °C, the given medium or phase is liquid.
- the term “at least one cosmetically acceptable component is dissolved” in a liquid medium means that at a temperature of the cosmetic com position in the range of from 5 to 70 °C, preferably in the range of from 10 to 60 °C, more pref erably in the range of from 15 to 50 °C, the said at least one cosmetically acceptable compo nent is dissolved.
- a term “X is one or more of A, B and C”, wherein X is a given feature and each of A, B and C stands for specific realization of said feature, is to be understood as disclosing that X is either A, or B, or C, or A and B, or A and C, or B and C, or A and B and C.
- the skilled person is capable of transfer to above abstract term to a concrete example, e.g. where X is a chemical element and A, B and C are concrete elements such as Li, Na, and K, or X is a temperature and A, B and C are concrete temperatures such as 10 °C, 20 °C, and 30 °C.
- the skilled person is capable of extending the above term to less specific realizations of said feature, e.g.
- X is one or more of A and B” disclosing that X is either A, or B, or A and B, or to more specific realizations of said feature, e.g. “X is one or more of A, B, C and D”, disclosing that X is either A, or B, or C, or D, or A and B, or A and C, or A and D, or B and C, or B and D, or C and D, or A and B and C, or A and B and D, or B and C and D, or A and B and C and D, or A and B and C and D, or A and B and C and D, or A and B and C and D.
- the term “consists of with regard to the weight-% of one or more components indicates the weight-% amount of said component(s) based on 100 weight-% of the entity in question.
- the wording “wherein from 0 to 0.001 weight-% of the cosmetic composition consists of an effect pigment other than the organic effect pigment defined in any one of embodiments 1 to 7” indicates that among the 100 weight- % of the components of which said cosmetic composition consists of, 0 to 0.001 weight-% is an effect pigment other than the organic effect pigment defined in any one of embodiments 1 to 7.
- the cosmetic composition is substantially free of an effect pigment other than the organic effect pigment defined in any one of embodiments 1 to 7, preferably free of an effect pigment other than the organic effect pigment defined in any one of embodiments 1 to 7.
- Reference Example 1 Determination methods a. Determination of the average flakes size: Flakes were pressed onto a transparent micro scope slide and viewed through a Zeiss Axio Lab.AI optical microscope. Particle sizes were measured from microscope images using the Zeiss Zen software. b. Determination of the average surface area of the flakes: Flakes were pressed onto a transparent microscope slide and viewed through a Zeiss Axio Lab.AI optical microscope. Average surface areas were measured from microscope images using the Zeiss Zen software. c. Determination of the average thickness of the flakes/film: Thickness was measured in the film state, prior to blending to flakes. Film thickness was measured with a micrometer, measuring the film thickness at 3 locations of the film and taking an average. d.
- Determination of the pH pH of pre-cast CNC solutions and formulations with CNC flakes were measured with a Mettler Toledo InLab Routine pH probe with a Mettler Toldeo Sev- enCompact base unit. The pH probe was calibrated to pH buffer solutions at pH 4, 7, and 10. e.
- Determination of the average particle size of cellulose nanocrystals (CNC) Particle size was determined by photon correlation spectroscopy (Zetasizer 3000, Malvern Instru ments, Worcestershire, U.K.). Photon correlation spectroscopy (PCS) is a light scattering method; the measured CNC particle size values are the hydrodynamic radii of equivalent spheres and do not represent actual physical dimensions of the rodlike NCC particles.
- Example 1.1 an aqueous dispersion comprising cellulose nanocrystals from CelluForce NCV100 (CAS No. 9005-22-5, molecular formula [(C6O5H 10)22-28 SO3 Na]4-6, a BET specific sur face area of 400 m 2 /g, a crystallite average particle diameter of 2.3-4.5 nm, a crystallite average particle length of 44-108 nm, a sulfur content of 0.86-0.89 %, pH dispersed in water 6-7) was prepared with deionized water, cellulose nanocrystals and hydrochloric acid.
- CelluForce NCV100 CAS No. 9005-22-5, molecular formula [(C6O5H 10)22-28 SO3 Na]4-6, a BET specific sur face area of 400 m 2 /g, a crystallite average particle diameter of 2.3-4.5 nm, a crystallite average particle length of 44-108 nm, a sulfur content of 0.86-0.89 %, pH
- the amount of cellulose nanocrystals in the dispersion was of 2-3 weight-% based on the weight of the disper sion and the pH of the aqueous phase of the dispersion was of 2-3.
- the aqueous dispersion was poured to about 1-2 cm deep into a large, shallow, polystyrene tray.
- Examples 1.2-1.4 to the dispersion of cellulose nanocrystals was added different aqueous dyes (see Table 1 below for the type and amount of dyes).
- the pH of the obtained dispersion was of 2.7.
- the obtained dispersion was poured to about 1-2 cm deep into a large, shallow, polystyrene tray.
- the dispersion was either left within a fume hood to dry to a film overnight, or placed into a 75 °C oven for about 5 hours to dry to a film.
- Iridescent films are obtained (see Figure 1).
- the obtained films were peeled off the tray and put into a kitchen blinder and blended for 1-2 minutes to obtain flakes with a size in the range of 10 to 1000 micrometers and with different colors (see Table 1 below).
- Table 1 Table 1
- Mineral oil (> 90 weight-%) and the remaining part ( ⁇ 10 weight-%) is Eth ylene/Propylene/Styrene Copolymer (and) Butylene/Ethylene/Styrene Copolymer.
- Dielectric constant about 2 B.
- Aqueous base cosmetic preservative used for a water color eye-shadow
- Geismar base aqueous surfactant media
- Example 1 The CNC flakes obtained in Example 1 were put into the different cosmetic bases A, B and C according to Table 2 below. The flakes were hand mixed into the cosmetic bases at room tem- perature.
- compositions 2.1 , 2.2, and 2.3 the CNC effect pigments offer unique color properties such as color variability based on the composition of the base wherein they are suspended, namely a single product can provide an array of different flake colors depending on how it is formulated, and a holographic effect.
- Compositions 2.4, 2.5, and 2.6 demonstrate how dyes and pigments can add additional absorption color alongside the iri- descent color.
- Figures 2 to 4 are pictures and microscope images of the CNC flakes in the cosmetic composi tions 2.1 to 2.3 and Figure 5 is a picture of the CNC flakes in the cosmetic compositions 2.4 to 2.6.
- Comparative Example 1 Preparation of cosmetic compositions Pigment 1 :
- Cloisonne® Super Blue 636Z (powder) - INCI Name: Mica (and) Titanium Dioxide (and) Ferric Ferrocyanide
- Figure 1 is a scheme illustrating the step for producing iridescent films.
- Figure 2a is a picture of the CNC flakes in the cosmetic composition 2.1.
- Figure 2b is a microscope image of the CNC flakes in the cosmetic composition 2.1
- Figure 3a is a picture of the CNC flakes in the cosmetic composition 2.2.
- Figure 3b is a microscope image of the CNC flakes in the cosmetic composition 2.2
- Figure 4a is a picture of the CNC flakes in the cosmetic composition 2.3.
- Figure 4b is a microscope image of the CNC flakes in the cosmetic composition 2.3
- Figure 5 is a picture of the CNC flakes in the cosmetic compositions 2.4, 2.5 and 2.6.
- Figure 6 is a picture of the pigment 1 in the cosmetic composition C.1 , C.4 and C.7.
- Figure 7 is a picture of the pigment 2 in the cosmetic composition C.2, C.5 and C.8.
- Figure 8 is a picture of the pigment 3 in the cosmetic composition C.3, C.6 and C.9.
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Abstract
Description
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US5629055A (en) * | 1994-02-14 | 1997-05-13 | Pulp And Paper Research Institute Of Canada | Solidified liquid crystals of cellulose with optically variable properties |
US20100124651A1 (en) * | 2008-11-17 | 2010-05-20 | Kruger Inc. | Method of manufacturing nano-crystalline cellulose film |
US8398901B2 (en) * | 2008-12-11 | 2013-03-19 | Fpinnovations | Method for producing iridescent solid nanocrystalline cellulose films incorporating patterns |
CA2758042C (en) * | 2009-05-01 | 2014-11-25 | Fpinnovations | Flexible, iridescent nanocrystalline cellulose film, and method for preparation |
BRPI1015200A2 (en) * | 2009-05-01 | 2016-04-26 | Fpinnovations | methods for controlling iridescence wavelength in a nanocrystalline cellulose solid film, and for producing a nanocrystalline cellulose solid film. |
JP2013517352A (en) * | 2010-01-22 | 2013-05-16 | エフピーイノベイションズ | Dry nanocrystalline cellulose with controllable dispersibility and control method thereof |
JP6008879B2 (en) | 2011-02-15 | 2016-10-19 | ビーエーエスエフ コーポレーション | Pigment mixture for cosmetics |
CN102703092A (en) * | 2012-06-01 | 2012-10-03 | 南京信息工程大学 | Nano-cellulose liquid crystal membrane and application thereof |
FR3001468B1 (en) | 2013-01-30 | 2015-06-19 | Inst Polytechnique Grenoble | PROCESS FOR MARKING A PAPER |
JP6758805B2 (en) * | 2015-08-04 | 2020-09-23 | 王子ホールディングス株式会社 | Cosmetics |
JP2017048181A (en) | 2015-09-01 | 2017-03-09 | 王子ホールディングス株式会社 | Cosmetic |
CN105199123A (en) * | 2015-11-13 | 2015-12-30 | 南京林业大学 | Preparation method of cellulose nanocrystal iridescent anti-counterfeiting mark |
WO2017091893A1 (en) * | 2015-11-30 | 2017-06-08 | Anomera Inc. | Cellulose-based organic pigments |
EP3486291B1 (en) * | 2016-07-13 | 2022-12-07 | Kansai Paint Co., Ltd | Effect pigment dispersion |
GB201613997D0 (en) * | 2016-08-16 | 2016-09-28 | Cambridge Entpr Ltd | Self-assembled nanocrystals |
CA3044727A1 (en) * | 2016-11-30 | 2018-06-07 | Chanel Parfums Beaute | Cosmetic composition comprising nanocrystalline cellulose, method and use thereof |
CN108852889A (en) * | 2018-07-27 | 2018-11-23 | 成都新柯力化工科技有限公司 | A kind of osmosis type beautifying face and moistering lotion cosmetics and preparation method |
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